Alves moved to the Premier League team from Heerenveen in January for about 16 million euros but AZ claim they already had an agreement to sign the 27-year-old.
"I always speak with new players," Van Gaal told the commission. "In the conversation, which lasted about 20 minutes, I pointed out to Alves that he should join our training on January 7 and that he should not come too late. He promised me that."
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms